Printing telegraph transmitter and perforator



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PRINTING TELEGRAPH TRANSMITTER AND PERFORATOR Filed Feb. 5, 1940 '7 Sheets-Sheet 4 N O N FIG. 5

INVENTOR. .ERWIN A. GUBISCH BY ALBERT H. REIBER Dec. 16, 1941. 2,266,028

PRINTING TELEGRAPH TRANSMITTER AND PERFORATOR E. A. GUBISCH ETSAL 7 Sheets-Sheet 5' Filed Feb. 5, 1940 INVENTOR. ERWIN A.sua|sc|-| ALBERT l-LBEIBER 1 Dec. 16, 1941. E, A, Gums gT AL 2,266,028

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PRINTING TELEGRAPH TRANSMITTER AND PERFORA'I'OR Filed Feb; 5, 1940 7 Sheets-Sheet 7 INVENTOR. ERWIN A. GUBISCH BY ALBERT H. REIBER A ORNEY.

Patented Dec. 16, 1941 UNITED ,1;

PRINTING TELEGRAPH TRANSMITTER AND PERFORATOR Erwin A. Gubisch, Chicago, and Albert H. Reiber,

Evanston, 111., assignors to Teletype Corporation, Chicago, Ill., a corporation of Delaware Application February 5, 1940, Serial No. 317,310

11 Claims. (Cl. 178-80) This invention relates to printing telegraph apparatus and more particularly to a keyboard actuating and controlling apparatus for use primarily in telegraph communication systems.

An object ofthe invention is the provision of apparatus for facilitating and expediting the transmission of telegraph communications.

Another object of the invention is apparatus combined for direct transmission of telegraph messages from a keyboard, the preparation of a control strip containing the message to be transmitted, and its transmission from the strip, with mechanism for establishing the several different forms of operation.

The invention contemplates acombined keyboard transmitter, a tape perforator, and a transmitter for sensing the tape perforations and transmitting code signal impulses in accordance with the tape perforations, with mechanism for conditioning the apparatus for the respective operations.

A feature of the invention resides in the provision in apparatus of the type outlined, of mechanism for controlling the operation of the perforator either from the keyboard signal transmitter or directly from the keyboard, depending upon previously established conditions under which the apparatus is intended to operate.

Another feature of the invention resides in the control of the tape transmitter including its transmitting distributor by a single switch mechanism under the control of several independently operated elements.

A still further feature of the invention resides in an arrangement of parts whereby mechanisms for effecting code signal transmission are rendered inefiective under certain predetermined conditions of the apparatus for operation.

The above and other objects of the invention are accomplished through the provision of a keyboard transmitter, a tape perforator, a tape transmitter, and a character counting mechanism which is used when perforating the tape, combined in a unitary structure with-the several identified units mounted on a single base casting.

Such apparatus has proved to possess outstanding value in instances where it is desired to transmit impulses representative of the depres sion of character keys directly to the line or the transmission of signal impulses representing the characters stored in the form of code perforations in a perforated tape which may be prepared either independently or simultaneously with the transmission of signal impulses from the keyboard transmitter upon the operation of itskey levers. The several different conditions of operation are made possible through the provision of mechanism arranged to permit the transmis-' sion of impulses directly to a connected line circuit, the perforation of a tape, or the operation of the respective units simultaneously.

The keyboard mechanism includes a plurality of keys operative on pairs of vertically movable permutation bars through which interference bars of a perforating mechanism are moved selectively to control the operation of punch pins allotted thereto, and correspondingly perforate a tape. The permutation bars, in addition to controlling the position of the interferencebar's of the perforator, alsocontrol theefiectiveness of electrical contacts for determining the charactor of impulses transmitted to a connected line circuit representative of characters to be recorded or reproduced on a receiving printer at the distant end of the line circuit.

The apparatus constituting the invention may beoperatively combined with a receiving printer whereby the receiving printer will respond to the operation of the keyboard transmitter to'produce what is usually referred to as a home record. The receiving printer may also be rendered operative when the apparatus is being used for the preparation of a perforated tap which is sub sequently to be passed through a tape transmitter for the transmission of signal impulses in accordance with the perforationsffor indi-. eating to the operator the correctness of the operation of thekey levers and also the position of the printed characters in the lines of the page. Under such circumstances the receiving printer functions to indicat to the operator the end of the line of printing, which indicates the point of operation of the carriage return key to perfo rate correspondingly the tape and returnthe carriage of the receiving printer combined therewith to its beginning-of-line position. However, if the keyboard transmitter is not being employed because of the position of the mechanism for controlling the effectiveness of the respective units, then a mechanical step-by-step operated mechanism functions to indicate at all times to the operator the position of the characters with regard to the length of a line of printing and thus inform the operator when the carriage return key of the keyboard should'be operated for including in the tape a transverse row of perforations indicative of the carriage return function of the receiving printer.

'As previously stated, a tape transmitter constitutes an integral part of the apparatus. The

tape transmitter includes a plurality of tape sensing fingers, a cam distributor which is released for rotation upon the energization of an electromagnet controlled by contacts operated through; elements of the mechanism for determining the character or kind of operation of the apparatus, and a plurality of electrical contacts operated successively by the cam distributor to transmit to the line circuit impulses in accordance with the transverse rows of perforations in the perforated tape, as determined by the position of the tape sensing pins or fingers.

A better understanding of the invention .may be obtained from the following description taken in conjunction with the accompanying drawings, wherein a Fig. 1 is a perspective view showing the respective units embodied in the invention;

Fig. 2 is a plan View of the keyboard perforator transmitter mechanism of the present invention;

Fig. 3 is a front elevational view with certain parts in section in order to more clearly illustrate the invention;

Fig. 4 is an elevational view taken substantially on the line 4-4 of Fig. 2;

Fig. 5 is an end elevational view showing ele ments of the tape transmitter;

Fig. 6 is an elevational view taken substantially on the line 6-6 of Fig. 2;

Fig. 7 is an elevational view taken substantially on line 1--1 of Fig. 2;

Fig. 8 is an elevational view taken substantially on the line 8-8 of Fig.2;

Fig. -9 shows certain of the mechanism disclosed in :Fig. 2 in its other operative position;

Fig. 10 is a detail view of certain parts of the mechanism employed for operating the character counter; and

Fig. 11 is a circuit diagram showing the elec- The keyboard l4 includes a plurality of key levers pivotally mounted on a pivot rod 19 (Fig. 8) which extends transversely of and is mounted in the base casting l2. The key levers 20 are normally raised by individual springs (not shown) and are provided at their forward ends with key tops 2|.

Beneath the key levers 20 and extending transversely thereof are a plurality of pairs of permutation bars 22. The present invention has been applied to structure for operation on the basis of a five-unit code. Consequently, there are a corresponding number of pairs-of permutation bars '22. Each pair of permutation bars 22 comprises a bar 23 and a bar 24. These bars are all provided at each end with vertical slots or notches which fit over guide combs 25 and 26 having shafts 21 and 28. The bars '23 and 24 are thus held against longitudinal movement but are free to be shifted vertically.

Pivotally mounted on shafts 21 and .28 .are pairs of rock arms 29 and 3m interposedbetween each pair of code bars 22. The rock arms 29 and 30 are substantially T-shaped with their free ends formed with offset lugs on opposite sides of the pivot shafts 29 and 30 and spaced some distance therefrom. One of the lugs of each rock arm projects forwardly into a notch on the lower edge of the corresponding permutation bar and its other lug projects rearwardly beneath the lower edge of the corresponding permutation bar. With this arrangement, the depression of either bar of the pair of bars 22 rocks the rocker arm and lifts the associated permutation bar. Connected to each pair of rock arms 29 and 30 is a longitudinally movable permutation bar 3|. When the pairs of permutation bars 23 and 24 are moved in accordance with the depression of the key levers 20, the permutation bar 3| will be moved longitudinally in a direction corresponding to the setting of the permutation bars 23 and 24.

Impulse transmitter Intermediate the ends of the permutation bars 3| and thus between the rocker arms 29 and 30 are pins 32 and 33. Between the pins 32 and 33 of each of the permutation bars 3| is the lower end of a selecting finger 34 which extends upwardly through an opening in the base l2 and are mounted on a common pivot shaft .35 secured to brackets mounted on the base l2. The fingers 34 control a set of switch members 36 which are also mounted on .a common pivot shaft 31 suitably secured to upright members 5| and 52, Fig. 2. At the upper end of each of the selecting fingers 34 a projecting portion 38 is formed which, in accordance with the movement of the permutation bar 3| individual thereto will be moved into and out of operative relationship with the horizontal arm of the switch controlling members 36 which are in the form of bell crank levers, as clearly shown in Fig. 3. The fingers 34 and the bell crank levers 36 are held in proper spaced position on their respective pivot shafts and 31 by washers or spacers.

Each of the bell crank levers 36 has a hook 40 which cooperates with a contact spring 4| and normally holds the contact spring 4| out of electrical contact with its associated contact spring 42. The contact spring 4| is of such a character that it normally tends to engage its contact spring 42 but is held out of engagement therewith due to the fact that its bell crank lever has a projection 43 which cooperates with a cam drum 45. Cam drum 45 is mounted on a horizontal shaft 46 extending transversely of bell crank levers 36 and has cut in its periphery six notches -or slots arranged in a helical series so that as the cam drum 45 rotates, the slots will successively cooperate with projections 43 and, provided the bell crank lever 36 is at that moment free to move, will allow its movement and will permit the closure of contacts 4| and 42 through the medium of which impulses are transmitted to a connected line circuit, as will be subsequently described. In the normal rest position of cam drum 45, one of the slots is positioned with respect to projection 43 on its bell crank lever 36 to allow the contacts 4| and 42 associated therewith to be engaged. This results in normally having the line circuit closed through these contacts, which establishes a condition in the receiving printer to arrest its rotary elements and-condition it for subsequent operation.

Shaft 46 on which the cam drum 45 is loosely mounted is journaled in brackets 59 and Fig. 2, and has secured to it agear 53 which is meshed with a gear 54 mounted on a pilot shaft 55 which is journaled in two bearing brackets, one of which is indicated by the numeral 56. Power for driving pilot shaft 55 is communicated from a motor 51 through a pinion gear 58 mounted on its shaft which meshes with a gear 59 also mounted on pilot shaft 55. Shaft 46 and pilot shaft 55 rotate continuously with the operation of motor 51.

Cam drum 45 has secured to it a collar 69, a portion of which is serrated as shown in Fig. 8 and is normally urged along shaft 46 by a spring 6|. Secured to shaft 46 and arranged to cooperate with collar 60 is a similarly machined collar 62. As previously described, shaft 46 rotates continuously. However, due to the arrangement of collars 69 and 62, which constitute a clutch between shaft 46 and cam drum 45, the latter may be selectively rotated.

Spring 6| tends to move collar 69 along shaft 46 and into engagement with collar 62, but this action of spring 6| is normally prevented by means of a pivoted arm 63 which is latched into the path of a shoulder 64 formed on collar 66, Fig. 8, and which is spring-urged out of the path of shoulder 64. Shoulder 64 is also formed with a gradual camming surface so that as the collar 60 rotates it will cooperate with the associated portion of the stop arm 63 and cause collar 69 to be moved along the shaft 46 against the action -of spring 6] to disengage the serrated portions of collars 69 and 62 and stop collar 69 with its associated cam drum 45.

Arm 63 is pivotally mounted on a shaft 65 supported by bracket 52 and is urged in a clockwise direction about its pivot, as viewed in Fig. 4, by a spring 66, Fig. 8, which has one end secured to arm 63 and the other end secured to aspring post formed in the upper surface of base I2. Spring 66 tends to urge arm 63 out of the path of shoulder 64 formed on collar 66 but is prevented from doing so due to the engagement'of an extension 61, Figs. 2 and 8, of arm 63 either with shoulder 68 or shoulder 19 of vertically extending levers 69 and ll, respectively.

Levers 69 and T0 are pivotally mounted on a shaft 75 mounted in a substantially U-shaped bracket 76 secured on the upper surface of base I2. Levers 69 and H are normally urged toward each other by a spring H which has its ends secured to the free ends of levers 69 and H. Movement of the levers 69 and ll toward each other is limited by an arm 18 formed near the upper end of lever H.

Lever 69 is further urged about its pivot in a clockwise direction, as viewed in Fig. 8, by a spring 19 which has one end secured to a spring post formed in lever 69 and a spring post 83 secured to an ear formed on bracket 16 which supports pivot shaft 15. Integral with arm 69 is an arm 84 and integral with arm H is an arm 85, Fig. 2. Operation of arms 69 and H to move shoulders 68 and free of extension 61 of arm 63 to permit spring 66 to move arm 63 free of shoulder 64 on collar 66 is accomplished through the rotation of arms 84 and 85, respectively, in accordance with functions of the keyboard mechanism to be described later.

Pivotally mounted on shoulder screws secured to base [2 is an arcuately shaped plate 89, Fig.

9, which has a vertically extending ear 99,Fig..

2, which supports a pivot rod 91. Pivotally mounted on rod 9| are levers 92 and 93 arranged with springs 94 and95, respectively, as shown in Fig. '1. These springs serve to maintain. the levers 92 and .93 in their proper operative position. One arm of lever 92 extends beneath arm of arm 19, whereas an arm of lever 93 is positioned above arm 84 of arm 69.

Asshown in Fig. 1, lever 92 has an extension 98 engageable by the free end of an arm 99 secured to and operated by bail I99 which has arms secured to a space bar llli. Consequently, when thee-pace bar Illl is depressed, arm 99 will bemoved downwardly and through extension 98 lever 92 will be rotated counterclockwise, as viewed in Fig. 3, against its spring 94 to rotate arm 85 upwardly about its pivot shaft 15 and thus rotate arm H clockwise to move its shoulder 76 free of extension 6'l of arm 63. Because spring 71' has one end secured to arm 69 and its other end secured to arm 1|, arm H will, upon the counterclockwise rotation of arm 69, tend to follow its movement. Projection l8 integral with arm ll determines a fixed minimum space between arms 69 and H.

As shown in Fig. 8, lever 93 has an arm I62 which projects downwardly through an opening in base l2 and which has its free end aligned with theupper edge of a universal bail I93 pivotally mounted on pivot studs such as I94, shown in Fig, 1. In accordance with usual practice in telegraph keyboards, universal bail I93 responds to the depression of each of'the key levers 29 and the space bar NH. Upon its operation, arm I02 will be engaged to rotate lever 93 in a clockwise direction, as viewed in Fig. 8, to depress arm 84 of arm 69 to move thereby shoulder 68 of arm 69 free of extension 61 of arm 63 and thus permit spring 66 to rotate arm 63 about pivot shaft 65 free of shoulder 64. Under such circumstances spring 6! moves collar 60 to the right along shaft 46, whereby its serrated portion engages the serrated portion of continuously driven collar 52 to impart rotation to cam drum 45.

Shoulder 68' of arm 69 is in a plan-e slightly 5 lower, as viewed in Fig. 8, than the plane of shoulder 16. of arm H. Normally, extension 61 engages shoulder 68. When arm 84 is rotated about its pivot 15 by lever 93, arm 69 is rotated to move its shoulder 68 free of extension 61. Rotation of cam drum 45 is thus eifected due to the engagement of collar 69 with continuously rotating collar 62. Due to the connection between arms 69 and H through spring 11, arm II will follow the counterclockwise rotation of arm r 69 and thus its shoulder 19 will tend to assume a position in the path of extension 61 under the influence of spring l1 and will be engaged by extension 61 should a key lever or the space bar be held depressed for a period longer than that required for cam drum 45 to complete one cycle of rotation, for under such circumstances shoulder 68 of arm 69 will be held out of the path of extension 61 of arm 63. When the key lever or the space bar is released, arm 69, by the action of its spring 79, rotates about its pivot 15 to the position shown in Fig. 8, and arm H, through projection 13 engaging arm 69, will assume its normal position whereupon extension (ii-will move free of shoulder 19 and will engage shoulder 68 of arm 69.

When it is desired to rotate cam drum 45 through a plurality of cycles, space bar Hll is held depressed, and since its depression through arm 99 rotates lever 92 to in turn rotate arms 85 and H and through universal bail I03 rotates lever. 93 in -turn to rotate arms 84 and 69, shoulders 63 and I5 of arms69t and II, respectively, will be moved free and out of the path of extension 61 of arm 63. Consequently, as long as shoulders 68 and 70 remain out of the path of extension 61, collar 60 continues its engagement with continuously rotating collar 62 to cause the corresponding rotation of cam drum 45. Upon the release of the space bar IOI, arms 69 and I return to the position shown in Fig. 8 and extension 67 engages shoulder 60 of arm 69, whereupon arm 63, due to its engagement with the cam portion of shoulder 64 on collar 60, will cause collar 66 to be moved along shaft 46 to the left, as viewed in Fig. 8, to effect its disengagement with continuously rotating collar 62.

Each of the selecting fingers 34 is provided at its upper end with upwardly'projeoting portions I08, Fig. 8, having beveled upper edges which co operate with a beveled edge rib on a locking bail I09, pivotally mounted on shoulder screws secured to brackets and 52, Figs. 2 and 8. A spring II 6 which has one end secured to lock bail I09 and the other end secured to a spring post fastened in base I2 tends to depress lock bail I09 and hold a roller III fastened to an arm I I2 integral with the lock bail I09 in contact with a high portion of a cam II3 on cam drum 45 when the cam drum is in its normal arrested position. Shortly after the cam drum 45 is released for rotation and the high portion of cam II3 has been moved from under roller I I I on arm I I2, lock bail $69 under the action of spring II 0 is moved about its pivot to bring the beveled rib into cooperation with the beveled portions of projections I68 and consequently lock the selecting fingers 34 in the position in which they were set through the operation of permutation bars 3I. With such a construction, the permutation bars 3! cannot be operated during the transmission portion of the cycle of rotation of cam drum 45 or until the lock bail I59 is moved by the high part of cam IE 3 to free the beveled rib from the beveled portions of projections I06 on the selecting fingers 34.

Tape pcrforator The perforator comprises a set of punch pins II 8, Fig. 3, movable through openings in upper and lower guide plates I I 9 and I20 and cooperating with a die plate I2I to perforate a tape I22.

The plates I58 and I2I are spaced apart to form a tape guide. The punches II8 are selectively operated by an actuating member or hammer I23 and a set of interponents I24 corresponding in number to punches H8 and permutation bars 3I. Operatively associated with each of the interponents I24 is a pivoted member I25 which has its lower end connected to its permutation bar 3!. Thus, upon the permuted setting of the permutation bars SI the interponents I24 will be set correspondingly through the movement of pivoted members I25. Interponents I24 thus will be positioned either in alignment with or out of alignment with the punches I I8 to perforate correspondingly tape I22 upon the actuation of hammer I23.

Also associated with code punches I I8 is a feed hole punch, not shown, which is operated invariably for each operation of hammer I23 to perforate the feed holes which are engaged by the pins of a pin wheel I26, Fig. 3, operated step by step for each operation of hammer I23 to present an unperforated area in alignment with the code punches H8.

"Hammer I23 oscillates on pivot screws I2'I secured to brackets I28 and I29, Fig. 2,'and supports at its forward edge, as viewed in Fig. '7, the free end of each of the interponents I24.

Oscillation of punch hammer I23 about its pivot is through arm I30 secured to one end of a. lever I3I pivoted on a rod I32 secured in a projection I33 formed in the side wall of bracket I29, as shown in Fig. 2. To the free end of lever I3I a cam follower roller I34 is secured. Connection between hammer I23 and arm I30 is by means of a reduced portion of arm I30 projecting through an opening in the horizontal wall of hammer I 23. Upon each oscillation of lever I3I, arrm I30 and the hammer I23 will be reciprocated under the tension of a, spring I35, Fig. 3, which has one end secured to hammer I23 and the other end secured to a spring post mounted in bracket I29.

As shown in Figs. 2 and 7., cam roller I34 engages the periphery of cam I36 formed on a sleeve I3'I to which power is communicated from motor pinion 53 and shaft 55 through a combination friction and toothed clutch I38 which includes a driving and a driven portion. The former portion is secured to shaft 55 whereas the latter portion is fastened to sleeve I37 and normally tends to engage the driving portionby the action of a spring I39, but is unable to do so when stop projection I40 formed on lever I 4| pivoted at I42 lies in the path of stop lugs I43 and I44 formed in member I45. Member I45 tends to rotate by power communicated through the friction elements of clutch I30 but is held against rotation due to the fact that either stop lug I43 or I44 engages stop projection I40 on lever I 4|, which is held in the path of the stop lug I43 or stop lug I44 by the action of spring I46 which has one end secured to a fixed spring post and the other end secured to a lever I4I below its pivot I42. Spring I46 thus tends to urge lever MI in a clockwise direction about its pivot I42, as viewed in Fig. 7. Also secured to lever MI is a cam roller I4'I. This roller engages cam I 48 (Fig. 2) following the movement of lever MI in a clockwise direction, as viewed in Fig. 7, whereupon stop projection I46 is moved free or out of the path of stop lug I43 0r I44, depending upon the rotative position of member I45.

As cam I48 rotates, it engages roller I41 carried by lever MI and rotates such lever counterclockwise about its pivot I42 against the action of spring I46 while it is unlatched by a horizontal projection I49 on the lower end of lever I4I, engaging shoulder I55 of lever I5I pivoted at I52 in a bracket I53 secured to base casting H2. The right-hand end of lever I5I, as shown in Figs. 1 and '7, is formed with a horizontal projecting portion I54 which carries an adjustable screw I55 engageable by one end of a lever I56 pivotally mounted on a rod I5'I mounted in a U -shaped member I58 cooperating with pivots I59 and I60 formed in a U-shaped member I6I secured to the underside of base I2. Lever I56 is under the tension of spring I62 and is engageable by the end of arm I53 integral with universal bail I03, as shown in Fig. 1. Also pivotally mounted on pivot rod I5'I is an arm I65 which engages the lower surface of a horizontal projection I66 formed in member I 6? which, like'lever I5I, is pivoted on pivot rod I52. As shown in Fig. 7, the left-hand end of lever I6! is in the same vertical plane as the corresponding end of lever II, and near its end I13; which engages the underside of lever I5I, has a shoulder I14 formed which is ofiset slightly with respect to shoulder I56 of lever I5I and engaged by projection I49 of lever I4I.

According to Fig. 1, each of the levers I5I .and I61 has a vertically extending spring post intermediate which is a spring I15 which rotates the levers I5I and I61 about their pivot rod to hold the left-hand ends of such levers normally in engagement. Lever I5I has an additional spring post to which is secured one end of a spring I16, the other end of which is secured to a fixed spring post. Spring I16 serves to rotate lever I5I counterclockwise, as viewed in Fig. '1.

Upon the operation of a key lever 26 or the space bar I6 I, universal bail I03 is rotated about its pivots I64 to cause its arm I63 to engage lever I56 and rotate it against the action of its spring I62, whereupon screw I55 is engaged to rotate lever I5I to remove shoulder I56 from the path of projection I49, formed in lever I4I. By the action of spring I15, lever I61 tends to follow the movement of lever I5I to move shoulder I14 into the path of projection I49 on lever I4I. Consequently, if the depressed key lever or the space bar IIII is held depressed for a period longer than that required for shaft 55 to complete a half cycle of rotation, projection I49 will engage shoulder I14 of lever I61 and prevent the further rotation of cam I48 as well as cam I36 and thus preclude repeat operation of the perforator. Upon'the restoration of the key lever or the space bar I6I, lever I5I is restored to its normal position by spring I16 and through the end I13 of lever I61 this latter lever is rotated about its pivot I52 to'remove shoulder I14 from the path of projection I49 of lever I4I, which snaps into engagement with the shoulder I56 of lever I5I, in which position lever I4I remains until a succeeding key lever or space bar I6I is depressed.

The withdrawal of shoulder I56 from the path of projection I49 permits spring I46 to perform two functions; first, the withdrawal of projection I46 from the path either of stop lug I43 or I44 and, secondly, to move roller I41 into contact with cam I48. Upon the release of cam I48 for rotation through the friction element of clutch I38, the teeth of the clutch engage and cause the rotation of cam I36, whereupon arm I3I is operated to move hammer I23 upwardly and cause the operation of the punches I I8 in accordance with the position of the interponents I24 which are guided by the forward endof punch hammer I23 in accordance with the permuted setting of permutation bars 3I, as determined by the position of permutation bars 23 and 24 operated upon the depression of the key levers 26 or the space bar I6 I. I

U-shaped member I58 is, as previously described, pivotally mounted on pivots I59 and I66 and has an arm I11 through which it may be rotated to swing lever I56 and arm I65 out of the path of projections I54 and I66 on levers I56 and I61, respectively. When so positioned,

lever I56 will not be operated upon the operation of universal bail I63 and the clutch I38 will not be tripped through such an operation.

Also secured to hammer I23 i a pawl I18 engageable with teeth I19 formed on pin drum I26. For each reciprocation of punch hammer I23, pin drum I26 will be rotated a distance equal to the space between two of theteeth I19, for when the punch hammer moves upwardly, pawl I18 engages the next succeeding'tooth, and when the punch hammer I 23 is moved downwardly by spring I35, pawl I18 is moved correspondingly and the pin drum I26 rotates. Pin drum -I26 has a ratchet wheel I86,Figs. 1 and 7, engageable by a holding pawl I8I. in its advanced position.

As is customary in keyboard perforators, mech--' anism is provided for rotating pin drum I26 clockwise, as viewed in Fig. l,'to bringthe previously perforated areas in alignment with the punch pins II8 for modification or cancellation. Clutch I38 is of a type arranged to be stopped following the completion of each cycle of operation. In the present structure, foreach half revolution of cam I36, the perforator is operated to perforate the tape I22 with a transverse row of perforations. Spring I39 normally tends to effect engagement between toothed portions of the clutch I38, but in the rest position of cam I48 is prevented from effecting such engagement due to the provision'of a'cam I83 mounted on sleeve I31. Cam I83 cooperates with a post I84 fixed in casting I2 and arranged for each revolution of cam I35 to move the splined portion of sleeve I31 along shaft 55 and thus disconnect the driven portion of the toothed clutch from the driving portion thereof. Cams I36 and I83, however, tend to rotate due to the fact that power is communicated thereto through the friction portion of the clutch I38; Immediately upon the removal of projection I46 from the path of either stop lug I43 or I44, cam I83 is rotated sufliciently to move its high portion from engagement with post I84 whereupon spring I39 move the driven portion of the toothed clutch to the left, as viewed in Fig. 2, to effect its engagement with the driving portion of the clutch.

- Under certain conditions of operation it is desired to effect a continuous rotation of cam I36 and thus cause the repeated step by-step advancement of tape I22 through the perforating mechanism. With normal operation, cam I36 makes a half revolution for each depression of a characterkey 26 or a depressionofspace bar I6I, due to the fact that shoulder I14 of lever I61 is held in the path of projection I46 of lever;

similarly to key levers 26. Key lever I85 does not operate either permutation bars 23 and 24 or universal bail I63, but it does operate a lever I66 pivoted in :a bracket mounted on the underside of casting I2, as clearly shown in Fig. 1. The

opposite end of lever I86 lies beneath arm I 65.

which, as previously described, operate lever I61. When key lever I85 is depressed, lever I86 is rotated about its pivot to rotate arm I65 and likewise lever I61 to move shoulder I 14 out of the path of projection I49 of lever I4I. Now, if a key lever 26 or the space bar I6I is operated, universal bail I63 will be operated to rotate lever I56 and, in turn, lever I5I to move shoulder I56 of lever I5I free of projection I49 of lever I 4| Projection I46 will be moved free of either stop lug I43 or I44 and the toothed portions of'clutch I38 will be engaged and cam I36 will rotate, caus-' ing the operation of lever I3! and the reciprocation-of punch hammer I23. The punches H8 will be operated in-ac'cordance with the key lever 29 or the space bar I9I which may be depressed. As long as a key lever 29 or the space bar I9! and key lever I85 are depressed, cam I36 will rotate through a number of cycles of operation, notwithstanding the fact that cam I83 engages post I94 and temporarily disengages the driven portion of the toothed clutch from its driving portion. However, since cam I93 operates continuously by power communicated thereto through the friction portion of the clutch I39, the toothed portions thereof merely disengage and engage immediately to render cam I36 continuously operative to perforate tape I22 in accordance with the position of the interponents I24 under th control of permutation bars 3 I Tape transmitter Tape I 22, following its perforation in accordance with the operation of key levers 29, passes to the tape senser or tape transmitter 11. The tape senser I 1, as previously noted, is also mounted on base I2 and includes oppositely disposed side plates I99 to the upper surface of which is fastened a plate I9I to which is pivotally mounted a tape lid I92 having a spring operated latch I93 cooperating with a fixed shoulder to hold the lid I92 in its lowered position or the position shown in Fig. 1. The forward edge of tape lid I92 includes a series of apertures I94, five in number in the'present instance, due to the fact that the apparatus is constructed on the basis of a fiveunit code. If a different code was being used, the number of apertures I94 would correspond to the code. Also secured to plate I9I is a plate I95 which is recessed to receive tape I22 as it is advanced from the perforator I6. Tape lid I92 confines the tape I22 in the recess of member I95.

The perforations in tape I22 are arranged to be sensed by a sensing pin I95, Fig. 3, one individual to each element of the code, which is secured to one arm of a T-shaped lever I 91 pivoted on a pivot rod I98 mounted in a bracket plate secured to side plates I99. Each of the lever I91, there being five of such levers, has its individual spring I99 which normally tends to rotate its lever about the pivot rod I98 in a counterclockwise direction, as viewed in Fig. 3, to bring sensing pins I96 in contact with tape I22. Of course, if a pin I96 encounters an unperforated area of tape I22, the movement of lever I91 is limited, as compared to its movement when pin I96 is beneath a perforation in tape I22.

Levers I91 are normally under tension of springs I99 but are normally held in a position wherein pins I96 are free of tape I 22 by a bail 292, Fig. 3, pivoted on pivot points such as 293 secured to side plates I99. Bail 292 is operated mechanically as will later be described to rotate levers I91 about pivot rod I98to withdraw pins I96 free of tape I22 and also to allow levers I91 to be moved by springs I99 to a position whereby pins I96 can sense the aligned area of tape I22. If pin I96 encounters an unperforated area, then its lever I91 will be held in one position, whereas if pin I96 does not encounter an unperforated area, lever I91 assumes a different position. These respective positions are indicative of the signal impulses to be transmitted in accordance with perforated and unperforated areas of tape I22.

Pins I96 sense the respective areas of tape I22 simultaneously, whereas it is necessary to transmit to the connected line circuit, signal impulses indicative of the sensed areas of the tape successiv'ely.- In order to perform this operation, a cam drum 294 is mounted on a shaft 295, one end of which is journaled in a bracket fastened in an extension 296 of the bracket supporting one end-of shaft 55. Keyed to shaft 295 is a gear 291 meshed with a gear 299 fastened to shaft 55. Power from shaft 55 is therefore applied continuously through gears 29'! and 298 to shaft 295. Cam drum 294 has a splined collar 299 slidable along shaft 295 under the tension of a spring H9 and constitutes the driven portion of a toothed clutch 2, the driving portion of which is pinned to shaft 295 and thus rotates continuously. Collar 299 has a stop lug 2I2 engageable by stop arm 2 I 3 fixed to move collar 299 to the right, as viewed in Fig. 5, along shaft 295 against the tension of spring 2H], and secondly, to effect disengagement between the driving and driven portions of clutch 2 II and thus arrest rotation of cam drum 294.

Stop arm H3 is pivoted on a pivot rod 2I5 secured to one of the side plates I90 and has a link 2I6 having its other end connected to armature 291 of an electromagnet 2I8, the energization of which is controlled, as described later. Upon the energization of electromagnet 2I8 its armature 2!! is attracted and through link 2I6 stop arm 213 is moved free of stop lug 2 I 2 to permit spring 2I9' to'move collar 299 to the left, as viewed in Fig. 5, whereupon the driven portion of clutch 2II engages its driving portion. Cam drum 294 thus rotates until stop arm 213 is moved by the action of a spring 2I9, Fig. 4, upon the de-energization of electromagnet 2I8 into the path of stop lug 2I2, whereupon collar 299, due to a camming action between stop lug 2I2 and stop arm 2| 3, will be moved to the right, as viewed in Fig. 5, to disengage the driven portion of clutch 2H 40 from its driving portion.

Also mounted on cam drum 294 are a plurality of cams 229, 22I, 222, 223, 224, and 225,'each provided in its periphery with a notch 226, Fig. 3, which are arranged helically and which cooperate with one arm of a pivoted lever 221 individual to each of the levers I91,-whereby such levers 221 may be operated successively, except for the lever assigned to the start and stop impulse, in accordance with the position which lever I91 assumes as determined by the sensed areas of tape I22. As shown in Fig. 3, the upper end of lever 221 cooperates with the right-hand end of its associated lever I91 and is held in the position shown in Fig. 3 unless lever I 91 moves sufficiently, as

- I will be the case when its pin- I96 passes through a perforation in tape I22 to clear the upper end of its lever 221. The lever 221 allocated to the start and stop signal impulses does not have a lever I91 and therefore it is operated invariably for each cycle of rotation of cam drum 294 to transmit a start impulse preceding each code combination of impulses and a stop impulse following such code combination of impulses.

Individual to each of the pivoted levers 221 are contact springs 228 and 229, the former of which has its upper end insulated and engaged by a hook portion of its lever 221. Spring 228 tends to rotate lever 221 counterclockwise about its pivot, as viewed in Fig. 3, but normally is prevented from such operation due to theengagement of the upper end of lever 221 with the right-hand end of lever I91. However, when lever I91 rotates in response to pin I96 passing through a perforation in tape I22, the right-hand end of lever I9! is moved free of the upper end of lever I21 and spring 228 upon the presentation of slot 226 of one of the cams 220 to 224, inclusive, is in alignment with the lower arm of lever 221 to effect closure between contact springs 228 and 229. The closure of contacts 228 and 229 will apply to the line circuit connected thereto a signal impulse indicative of such operation. Due to the fact that the notches 226 are helically arranged, levers 221 will be operated sequentially in accordance with the perforated and unperforated areas of tape i22. Of course, for each presentation of a notch 226 to a lever 221, spring 228 attempts to move lever 221 about its pivot to permit the closure of contacts 228 and 229. Such operation will be prevented if lever I91 has not been moved sufiiciently to clear its right-hand end with the upper end of lever 221. Under such circumstances lever 221 remains in the position shown in Fig. 3 and contact springs 228 and 229 remain open to impress a spacing signal on the line circuit.

As previously described, levers 191 are operated cyclically by bail 262 against the tension of springs 699. To efiect such operation, cam drum 294 has a cam 239 operative on a roller carried by an arm 23! of bail 202 so that for each cycle of rotation of cam drum 204, cam 230 will operate bail 222 to withdraw levers I91 against the tension of springs I99.

Tape I22 is advanced through the tape transmitter I1 step by step by the action of a pin wheel 232 engaging the feed perforations in the tape I22. Pin wheel 232 is on a shaft 233 journaled in bearings secured to the underside of plate I9I.

Also included on cam drum 294 and rotative therewith is a cam 234 which cooperates with a roller 235 secured to the free end of an arm 236 pinned to a rod 231 journaled in the rear bracket I96. Secured to the other end of rod 231 is a lever 238, Fig. 5, to which is secured a pawl 239 adapted to engage the teeth of a ratchet wheel secured to shaft 233 to which pin wheel 232 is secured. For each revolution of cam 234 rod 231 will be oscillated to cause the pawl carried by lever 238 to engage a tooth on its associated ratchet wheel to cause the advancement of shaft 233 and pin wheel 232 to present the next transverse row of perforations to the sensing pins I96.

Character counter It was previously indicated that when operated to prepare the perforated tape, it is necessary to indicate to the operator the length of the line of printing to apprise the operator of the end of the line in order that the carriage return signal may be perforated in the tape. To achieve this object, the structure includes what has been referred to as a character counter operated upon the depression of each'character key for indicating to the operator the number of characters included in the line of printing and thus notify the operator when the line has been filled, when the carriage return key should be depressed, which includes in the tape a carriage return signal and returns the counter to its zero position. The character counter is disclosed in Figs. 1, 3, and 4. Significant, though, is the fact that this mechanism is disclosed also in pending application Serial No. 317,309, filed Feb. 5, 1940, in the name of E. A. Gubisch.

Referring now to Figs. 1, 3, and 4, the character counter embodies a supporting bracket 245 to which is secured an arcuate scale 245 marked surface of bracket 245.

in accordance with character numbers and over which a pointer 241 moves in response to the'operation of the character keys to indicate to the operator the number of characters perforated in thetape I22. Pointer 241 is secured to shaft 248 journaled in bracket 245 and provided with a toothed section 249 which is engageable by' a stepping pawl 259 and a holding pawl 25I. Steppingpawl 259 is secured to one'end of a lever 252 secured to shaft 253 journaled in bearings formed in bracket 245. The lower end of pawl 250 slidably engages a pin 254 secured integral with an adjustable plate 255 also supported by bracket 245. A spring 256 tends to move the upper end of pawl 259 toward the ratchet teeth of segment 249 but is prevented in the normal position of the pawl, the position shown in Fig. 3, due to the cooperation of its lower end with pin 254. The lower end of pawl 259, however, is cut away so that upon elevation of pawl 25!! due to the rotation of arm 252, spring 256 will be effective to bring the upper end of pawl 250 into engagement with the ratchet teeth of seg-v ment 249; Holding pawl 25! is pivoted on a shoulder screw 251 threaded in bracket 245 and has arms 258 and 259. To arm 253 a link 260 is connected which, in its lower end, has a horie zontal projection 25I engageable by lever 262 pivotally mounted at 263 in a bracket 264 pivotal- 1y mounted on .the upper surface of base casting I2. shoulder screw 265. Arm 259 of holding pawl 25I cooperates with a latch 266 pivotally mount-- ed on bracket 245 and provided with an arm 261 engageable by a pin 268 mounted in the forward portion of segment 249. Latch 266 serves to latch holding pawl 25I free of the ratchet teeth in segment 249. Holding pawl 25I is tensioned by means of a spring 210, and latch 266 is ten sioned by means of ,a spring 21 I.

For each operation of stepping pawl 259, pointer 241 will be advanced a distance representative of one character where it will be held by holding pawl 25I pending subsequent operation. of the its other end fastened to a grooved disc integral with pointer 241. As the pointer 241 is stepped for each operation of stepping pawl 259, the

cord 214 will be wound on the grooved disc and the spring 212 will be extended so that upon the withdrawal of holding pawl 25!, the pointer 241 under the tension of spring 212 will be returned to its zero position as shown in Fig. 3, wherein pin 258 engages arm 261 and moves latch'256' free of arm 2590f holding pawl 25!.

A stop 215 limits the return of pointer 241.

Rod 253 to which arm 252 is secured extends rearwardly of bracket 245 and has its other end journaled in a plate 215 mounted on the rear Also secured to rod 253 are two arms 211 and 218. Arm 218 carries at its free end a pin 219, Figs. 2 and 10, slidab-ly mounted in a slot 280 formed in a bar 28! and having one end of a spring 292 secured thereto, the other end of which is fastened to a spring post extend-v Such a-con ing from the back side of bar 23L struction permits the operation of bar 28! even The lower end of link 269 is guided by a Advancement of pointer 241 along cation of bar 28I under such conditions of opera tion.

For. each transverse row of perforations perfo-. rated in tape I22, bar 28| is reciprocated, as will be described later, and regardless of the significance of the transverse rows of' perforations. On certain functional operations such as shift, unshift, line feed, and carriage return, it is not desired that the pointer 241 be advanced since it is intended to indicate merely the number of characters included in a line of printing; Consequently, it is necessary when the key levers for the recited functions are depressed to block the operation of the mechanism through which stepping pawl 259 is operated. According to one embodiment of the invention, this blocking is accomplished through a series of levers rendered effective upon the depression of the function key levers.

Operative from the code bars 23 and 24 in response to the depression of the function key levers such as shift, unshift, line feed, and carriage return key levers is a rod 286 which extends through an aperture formed in base casting (2. When rod 286 is elevated and since it has its upper end adjustably aligned with an ear formed in lever 281 having an adjusting screw, which is pivotally mounted on rod 288, it will, through its engagement with a projection formed in lever 289,

rotate the latter lever about its pivot rod 288 into blocking relationship with the lower end of arm 211 secured to rod 253. A spring 299 having one end secured to a spring post projecting from lever 289 tends to rotate lever 289 counterclockwise, as viewed in Fig. 4. The other end of spring 289 is fastened to an arm 29l of a U-shaped member 292 which cooperates with the opposite arm of lever 289 to hold the lever in its clockwise position to which it is rotated upon the elevation of rod 286. The other arm 293 of U-shaped member 292 is engageable by a hook bar 294 secured to the forward side of bar 28!. Consequently, upon the movement of bar 29! to the left, as viewed in Fig. 1, hook bar 294 engages arm 293 of U-shaped member 292 to rotate arm 29| against the tension of spring 299 free of the end of lever 289, whereupon such lever tends to restore to the position shown in Fig. 4.

With the end of lever 289 in blocking relation with arm 211, rod 253 will not be rotated upon reciprocation of bar 29l with the result that the pointer 241 will not be advanced along the character scale. Even though bar 28I is reciprocated, it will not cause movement of arm 219, but its free movement will be permitted through an ex-' tension of spring 282.

In order to prevent false or incorrect operation of the counter should a function key be depressed with a staccato action, lever 289 is held in block-' ing relationship to arm 211 by latch 29! until bar 28| has been moved to the left sufficiently to allow pawl 296 to free rear extension 295 of lever 289 and has returned to the right, as viewed in Fig. 4. The following operations are as previ-' 1 pointer '241.

pawl 296 pivotally mounted to a plate secured to rod 28L When lever 289 is moved into blocking relationship to arm 211, its arm 295' will be positioned below the free end of pawl 299. Now, when bar 28l is moved to the left, as viewed in Fig. 4, pawl 293 is above arm 295 and even though latch 29! may be released, lever 289 will not assume its normal position due to the engagement between pawl 299 and its arm 295. Just before bar 28! reaches its extreme right-hand position or the position shown in Fig. 4, pawl 296 moves clear of arm 295 so that if latch 29! has been released, lever 289 may assume the position shown in Fig. 4 to permit rotation of rod 253, the movement of stepping pawl 250, and the advancement of pointer 241 along the scale on member 245.

The approach of the end of printing for a page printer is indicated by a signal device operative in response to a predetermined movement of the This device embodies a cam 291 mounted on shaft 248 to which pointer 241 is fixed. Operatively associated with cam 291 is a roller carried by one arm of a bell crank lever 298 pivoted to bracket 245 and normally urged by a spring 299 to bring its roller into engagement with the surface of cam 298. The other arm of bell crank lever 298 operates contacts 399 which are normally open and which are included in the energizing circuit of a signaling lamp 39L Nor- ;mally, contacts 398 are open. However, when the circuit for signal lamp 39I will be completed.

The illumination of lamp 391 notifies the operator of the approach of the end of printing for a page printer and also that shortly thereafter the carriage return key lever should be depressed.

As previously described, pointer 241 is held in its advanced position by a holding pawl 25l engaging the teeth on segment 249. Withdrawal of holding pawl 25| from engagement with the indicated teeth is achieved through the clockwise rotation of lever 262, as viewed in Fig. 1, upon the downward movement of hook bar 392 which is integral with key lever 393 identified with the carriage return function. When this key lever is depressed, hook bar 392 is moved downwardly, engaging the free end of lever 252 and, due to its relation with link 269, holding pawl 25| is r0- tated counterclockwise, as viewed in Fig. 3, against the action of its spring 219. Upon the removal of the holding pawl 25I from engagement with the teeth of segment 249, spring 212 operative on lever 213 and pointer 241 through cord 214 is effective to rotate pointer 241 to its zero position where pin 288 engages arm 261 and moves its associated arm 266 to a position where its shoulder is free of extension 259 of holding pawl 25! Holding pawl 25l may then assume a position operative with the teeth of segment 249.

The apparatus previously described may be operated independently of the perforattor, the perforator may be operated independently of the keyboard transmitter, and the keyboard transmitter and perforator may be operated simultaneously. Under certain conditions the tape transmitter'may also be operated. To determine these selective conditions, the apparatus embodies mechanism for rendering the respective devices operative; for example, in one position of the mechanism the keyboard transmitter may be operated, in another position the keyboard transmitter .and the tape perforator may be operated, whereas in the third position the keyboard perforator and the tape transmitter may be. operated simultaneously. With the mechanism set for keyboard transmission and perforator operation, the counting device need not be operated. Consequently, the mechanism is arranged to preclude the operation of the counting device when the switch mechanism is in either the keyboard transmission or keyboard transmission-perforator operation position. lhe counting device, therefore, will be operated only when the switch mechanism is in the perforator operation and tape transmission position. However, if the switch mechanism is in the latter described position and should it be changed to its keyboard transmission position for the transmission of an urgent or flash message, the counting device will not be disturbed; that is, the pointer 24! will remain in its advanced position. When the switch mechanism is restored to its former position, the counting device will be operated to continue the indication of the number of characters in the line as perforated in the tape I22.

The switch mechanism includes elements for rendering the respective devices operative and embodies, as shown in Figs. 1, 3, and 6, a lever 39'! 'pivotally mounted on a rod 398 extending between brackets and 52, Fig. 2, and capable of being rotated against the action of a spring 399 which has one end secured to a spring post integral with lever 391' and the other end secured to a spring post formed on lever 3 Hi which, like lever 301, is pivotally mounted on rod 399. S ring 399 serves as a connection between levers 391 and 3H). The lower end of lever 3!!! is bifurcated and has centrally of its projections a knife-edge 3! l. The projections and the knifeedge 3 cooperate with a detent pin 312 secured to a lever 313 pivoted to bracket 5| and urged upwardly, as viewed in Fig. 1, by a spring 3M which has one end secured to a fixed spring post and the other end secured to the free end of lever 3| 3. Spring 399 tends to move lever 39! clockwise with respect o lever 3| 0, as viewed in Fig. 1. Secured to lever 39! is an arcuate member 3H5 which has on its, front surface the letters TP, K, KP. which represent the several positions of the switch mechanism for the several operations; namely. ta e tra smission-perforator operation, ke board transmission. and keyboard transmission-perforator operation, respectively. Cooperating with the lower edge of member 3i5is a r ller 3H5 sec red to one end of pivoted lever 3 ur ed clockwise about its pivot by a s ring 3! 8 and also carrying at its free end an index finger 3 l 9 servin to ind cate, in coo eration with the letters K. and KP, the respective positions of the switch mechanism for the particular operati n. Member 3I5 also has near its extreme right-hand end a notch engageable by roller 345 to hold the member 301 in its extreme left-hand position against the action of spring 399.

Integral with lever 3 is an arm 322 which has an u wardly extending projection 323 and a downwardly extending projection 324. Proiection 324 is connected with lever I'll by a link 325 whereby lever ill is moved to rotate U- shaped member I58 a ,ut its pivots I59 and I 69 to move lever !56 into or out of the path of projection I54 of lever I5l. At the lower end of projection 324 is a horizontally projecting arm 325', Fig. 6, which carries a roller operative on a cam surface 32'! formed in a lever 328 pivoted to the upper surface of base casting l2 at 329 for rotation in a horizontal plane and provided with an arm'33fl also pivoted at 329 for oscillamoved to the right, as viewed in Fig. 1, to rotate the U-shaped member 58 to move lever I56 out of the path of projection I54 of 'lever l5l. Under such conditions, when a key lever is depressed, universal bailii93 will be operated but there will be no action on lever [5| and consequently the periorator will not be operated even though interponents 124 do follow the movement of the permutation bars 3|, because the clutch through which power is communicated to cam I36 is not released. Also, with lever 30! in the indicated position, arm33ll is out of the path of an arm 33! of a lever'system 332, Fig. 4,'which is pivoted at 333 and has'arms 334 and 335 with a spring 336 tending to rotate the lever system clockwise about pivot rod 333. On arm 334 is a roller 33! engaging a cam 338 mounted on cam drum 45. which, in rotating, functions to restore stop arm 63 against thev tension of its spring 66 into the path of stop lug 64, Fig. 8, to effect disengagement between'the driven portion 69 and the driving portion 62 of the positive clutch through which power is communicated to cam drum 45 and also functions through arm 33Ito oscillate lever 339 about its pivot 329 when arm 328 has been moved by the roller on arm 326 to'its extreme clockwise position, as viewed in Fig. 9; .HOWGVEI, with lever 39'! in the position where. the index 3l9 is opposite the letter K engraved on member 3l5, arm 33B is held out of the path of arm 33! by spring 339, Figs. 2 and 9, and even though arm 83I is operated cyclically for each rotation of cam drum 45., no operation of arm 339'will be performed.

With the operation of the key levers 20, when the lever 391 is in position just referred to, the permutation bars 36 will be set permutably to set correspondingly selecting fingers 34 and operate through the universal bail projection I02 and lever 84, arm 69 to free arm 61, whereupon stop arm 63 is removed from the path of stop lug B4. Connection between the driven and driving portions of the positive clutch is thereby effected and,

the cam drum 45 rotates to operate the contact levers 49 successively in accordance with the position of selecting fingers 34 and, in turn, contacts 4| and 42 for transmitting a signal combination indicative of the permuted setting of the selector fingers 34. As cam drum 45 continues its r otation, cam 338 operates on roller 33! .to depress arm 334 and move stop arm 63 into the path of stop lug B4 and thus arrest cam drum 45 at the completion of one cycle of rotation, when it may again be released through the depression of another key lever operating on the universal bail or bar, as previously described.

With the lever 39! in the position just described, the repeated operation of cam drum 45 may be desired, and when the space bar is depressed, hook bar 99, due to its connection with bail 19, will be moved downwardly, as viewed in Fig. 1, and will. because of its engagement with projection 93, move the opposite end of lever 92 upwardly against the action of its tension spring 94 to rotate lever and move arm H to a posi tion where its projection for its shoulder Hlis out ofthe path of arm 91. Concurrently with the rotation of lever 92, universal bail I03 is operated and, through its connections, lever 84 is operated whereby arm 69 is rotated against the tension of spring 19 to move its shoulder 68 free of arm 61. Stop arm 63 will, under such circumstances be held by its spring 66 free of stop lug 64 to insure repeated operation of cam drum 45. For each rotation of cam drum 45, a signal combination will be transmitted indicative of the space signal condition. Upon the release of the space bar IOI, arms 69 and H return to the position shown in Fig. 8, whereupon arm 61 engages shoulder 68 and stop arm 63 is held against the tension of its spring 66 in the path of stop lug 64.

Secured to arm 322 is an adjustable screw 342, Fig. 6, engageable with an arm 343 of lever 3 I so that when lever 301 is moved to a position where index 3I9 is opposite the letters TP engraved on member 3I5, arm 343 will be rotated about rod 308 in a clockwise direction, as viewed in Fig. 1. To arm 343 a link 344 extending to an arm 345 pivoted on a shoulder screw secured to base casting I2 is connected. Lever 345 has a ball shaped end, as viewed in Figs. 2 and 9, engageable in a correspondingly shaped slot in plate 89 which, as previously described, pivotally carries arms 92 and 93 through which levers 85 and 84, respectively, are operated. When the switch lever 301 is in the position identified by the letters TP engraved on member 3I5, plate 89, through link 344 and lever 345, is rotated to the position shown in Fig. 9 wherein arms 92 and 93 are moved free of levers 85 and 84, respectively. Also, through lever 346 lever 262 which is capable of rotation in a horizontal plane and which is movable in a vertical plane is moved into the path of hook bar 302 so that upon the operation of hook bar 302 through the depression of key lever 303, its allocated operation, as will be subsequently described, will be performed. Through the movement of arms 92 and 93 out of the path of levers 85 and 84, respectively, arms 69 and H will not be operated upon the operation of the universal bail and the space bar to release arm 61 and withdraw stop arm 63 from engagement with stop lug 64. Under such circumstances, even though the universal bail and the space bar may be operated, cam drum 45 will be held against rotation.

With lever 301 in the position indicated by the letters -TP, lever 330 remains out of the path of arm 33I of the lever system 322, but through link 325 and arm I11, U-shaped member I 58 will be rotated about its pivots I59 and I 60 to position lever I56 directly above projection I54 of lever I5I. Now, when a key lever or the space bar is depressed, universal bail I03 will be rotated about its pivots I04, arm I63 will be elevated as viewed in Fig. 1, lever I56 will be rotated, and lever I5I also rotated to remove shoulder I50 from the path of projection I49 of lever I4I. Spring I46 of lever I 4| thus withdraws projection I40 from the path either of stop lug I43 or I44, depending upon the previous stop position of cam I45, whereupon cam I83 is rotated to permit engagement of the positive portion of clutch I38, whereuponpower is communicated to cam I36.

Through the operation of a key lever, permutation bars 3I are set permutably to set the interponents I24 correspondingly. With cam I 36 rotating, lever I3I will be rotated and through arm I 30 operate punch hammer I23 against the tension of its spring I35 to move the correspondingly selected punches II8 upwardly to perforate tape I22 with a transverse row of perforations corresponding to the setting of the permutation bars 3| identified with the particular key lever' depressed. As cam I36 continues its rotation and just before it has completed its half cycle of rotation, spring I35 is effective to restore punch hammer I23 to the position shown in Fig. 3 and in so doing operates the pin drum I26 through pawl I18 and ratchet teeth I19 to advance the tape I22 to present an. unperforated area in alignment with the punch pins II 8. Lever I5I will have been restored to its normal position upon the release of the depressed key lever so that projection I49 engages shoulder I50 and rotation of cam I 36 is arrested. However, if .the key lever be held depressed, projection I49 will engage shoulder I14 of lever I13 and thus assure that stop arm I 40 will be moved into the path of stop lug I43 or I 44 to arrest the rotation of cam I36. Now, when the depressed key lever is released, lever I5I will be restored to the position shown in Fig. 7 and projection I49 will snap from shoulder I14 of lever I13 to shoulder I50 of lever I5I. For each succeeding key lever depressed the operation just described will be repeated.

With the switch lever 301 in the tape transmission-perforate position, it is desired to operate the counting device I8; that is, for each operation of the perforator the pointer 241 is advanced along the scale 246 step by step. To so operate the counter, link 28I through the movement of which shaft 253 is rotated to operate-feed pawl 250 and thus rotate pointer 241 an appropriate distance is provided. Reciprocation of link 28I is accomplished through a lever 346, Fig. 4, pivoted at 341 and having one end fitted in an aperturein the extreme left-hand end of link 28I, as viewed in Fig. 4, and having its other arm engageable by-an arm 348 carried by arm I 3| which, as previously described, is operated by cam I36. Lever 346 has its pivot 341 carried in a U- shaped member 349 pivoted on a vertical axis formed in the upper surface of casting I Z-and provided with an arm 350, Fig. 2, engageable by'a roller carried in one arm of an L-shaped member 35I secured to link 325 which, as previously de-- scribed, is secured to projection 324 of arm: 322

which is integral with lever 301 and which is' set in accordance with the set positions of lever 301.v With lever .301 in the position for tape transmission andv perforator operation, the roller 1 on member 35I. will engage arm 350 and rotate U-shaped member 349 clockwise against the ten-.

the lower arm of lever 346 in the path of arm 348 carried by arm I3I which is operated by cam I 36. Now, for each half revolution of cam I 36, arm 348 will be depressed to rotate lever 346 and thus move link 28I to the left, whereupon rod 253 is rotated and pawl 250 engages a tooth in segment 249 to advance pointer 241 .Where it is held by holding pawl 25I For each half revolution of cam I36, link 28I will be reciprocated and pointer 241 will be advanced along the scale carried by member 246.

As pointer 241 is advanced, cam 291, Fig. 2, is also advanced to rotate bell crank lever 298 against the tension of spring 299. When cam 291 has been advanced to a predetermined point,

forates the tapecorrespondingly and which withdraws holding pawl 251 from engagement with the teeth of segment 243 free thereof to permit the restoration of pointer 24! to its zero position should be operated. This is possible due to the fact that plate 89 is in a position where lever 262 is in the path of hook bar 362 secured to lever 363 identified with the carriage return function.

When-perforated tape is being advanced from the perforator 16 due to its operation, the tape transmitter I? may or may not be operating simultaneously with the operation of the perforator 16. Operation of the tape transmitter ll depends upon the energization of eleEtromagnet 216 which, as previously described, Withdraws upon its operation stop arm 213 from the path of stop lug 252 and allows spring 213 to move sleeve 269 into engagement with the driving portion of the tooth clutch 2 l 1. Under such conditions sleeve 263 will be rotated and consequently cam drum 264 carrying cams 226 to 225, inclusive, will be correspondingly rotated.

Energization of electromagnet 218 is controlled by a set of contacts, Fig. 1, consisting of contact springs 355 and 356 mounted on bracket 29. When these contacts are closed, an energizing circuit for electromagnet 2|8 will be closed, as will be clear from an examination of Fig. 11 which shows diagrammatically the circuit connections for the contacts 355 and 356.

Contacts 355 and356 are controlled mechanically from several difierent mechanisms in order to controlthe energization of electromagnet 216 and the selective operation of the tape transmitter 11.

As shown in Fig. 1, an arm 369 of a lever 353 secured to a rod 359 cooperates with the insulated end of contact 356 to move such contact out of engagement with contact 355 and thus break the circuit of electromagnet 218 to arrest the operation of tape transmitter 11. Rod 359 is suitably journaled in brackets secured to base casting l2 and has secured to its forward end a depending arm 363 bifurcated at its lower end to cooperate with a pin 36! secured to an arm of a bell crank lever 362 rotatably mounted on a shoulder screw 363 and held in either of two positions by an offcenter spring 364. By moving bell crank lever 362 to either of its two extreme positions where in it will be held by spring 364, depending arm 363 .will be rotated either counterclockwise or clockwise, as Viewed in Fig. 1, to cause corresponding rotation of rod 359 and, in turn, lever 356, whereupon its arm 351 either moves spring 356 free of spring 355 or allows these springs to engage and thus complete the energizing circuit for electromagnet 218 and cause resumption in the operation of tape transmitter ii in a manner which has been previously described.

With the provision of lever 362, operation of tape transmitter I! may be selectively controlled by the operator, for with the lever 362 in its extreme lowermost position, as viewed in Fig. 1, contacts 355 and 356 are open and operation of transmitter I! through the d'e-energization of electromagnet 218 is precluded. With operation of tape transmitter I1 arrested and with switch member 331 in the keyboard perforate position, the perforator '16 may be operated for perforating tape !22 prior to the transmission of signals indicative of the transverse rows of perforations in tape I22. Such an arrangement enables an operator prior to transmission from perforated tape 122 to determine the accuracy of the message to be transmitted by examining the printed copy of the message as recorded on the receiving printer [3 in response. to the operation of the keyboard transmitter including the selectable fingers 34, cam drum 45, and contacts 4| and 42. When the accuracy of the message to be transmitted has been determined, lever 362 may be thrown to its uppermost position to close contacts 355 and 356 whereupon electromagnet 2 I8 will be energized and tape transmitter I! will operate in a manner well understood from the previous description for transmitting signal combinations indicative of the perforations in tape I22.

Also, cooperating with the insulated end of spring 356 is an arm 365 of a lever system 366 which has "an arm 36'! extending toward the transmitter 11, as viewed in Fig. 1, and having a section bent transversely of tape I22 located between the perforator l6 and the tape transmitter 11. When the section of tape I22 intermediate perforator l6 and tape transmitter l1 becomestaut, arm 36'! of lever system 366 will be raised and arm 365 will be rotated in a clockwise direction, as viewed in Fig. l, to move spring 356 free of spring 355 and thus open the energizing circuit of electromagnet 216 which will become d'e-energ'ized to arrest rotation of cam drum 266 and. discontinue the transmission of signal combinations to the connected line circuit. .As the tape I22 intermediate perforator l6 :and tape transmitter 11 loses its tautness or forms a loop therebetween, arm 26'! will drop sufliciently to rotate lever system 366 and move arm 365 free of contact 356 whereupon contacts 355 and 356 are again in electrical connection to complete the energizing circuit of electromagnet .218, when transmission through the operation of the tape transmitter I! will be resumed. Of course, the effectiveness of lever system 366 on spring 356 is contingent upon lever 362 being in its uppermost position wherein contacts 355 and 356 are in engagement. I

When switch member 361 is in its keyboard, tape transmission and perforator operation positions and if lever 362 is in its uppermost position when springs 355 and 356 will be in engagement, it is necessary to open the energizing circuit for electromagnet 218; that is, when the switch member 361 is in its direct keyboard transmission position, operation of the tape transmitter ll should be prevented.

In order to prevent the operation of tape transmitter I! when switch member 301 is in its direct keyboard transmission position, contact 356 is moved free of contact spring 355 through rotation of lever 358 counterclockwise, as viewed in Fig. 1, due to cooperation. of its arm 368 with a horizontal projection 369 fastened to projection 323 of arm 322. Horizontal projection 369 has a vertical projection which engages a pin carried by arm 368 of lever 358 and rotates lever 358 sufficiently to remove contact spring 356 for engagement with contact spring 355 and thus openthe energizing circuit of electromagnet 218 to arrest or prevent operation of tape transmitter ll when switch member 361 is in either of the two indicated positions.

It will be apparent from the previous description that the apparatus embodied in the present invention is capable of a variety of selective operations; that is, it may be used for direct keyboard transmission, keyboard transmission and periorator operation, or for tape transmission and perfora-tor operation depending upon the position of switch member 361. When the switch member 301 is in its tape transmission-perforator operation position, counting device I8 is effective for indicating tothe operator, as the composition of the message proceeds, the exact location of each character in the line of printing and informs the operator of the approach of the end of the line of printing when the carriage return key should be depressed for perforating in the tape a carriage return signal and for restoring the counting device I8 to its zero or beginning of line position. When the switch member 361 is in its tape transmission-perforator operation position, tape transmitter I1 operates in accordance with the transverse rows of perforations appearing in tape I22. If, during such operation, the transmission of a flash or urgent message is desired, switch member 301 may be moved to its direct keyboard transmission position which will open contacts 355 and 356, resulting in the deenergization of electromagnet 218 and the arresting of tape transmitter I1, the rotation of plate 389 to bring levers 92 and 93 into operative relation with levers 85 and 84, respectively, to place the transmitting drum 45 under the control of the key levers, and to render the counting device I8 inoperative either in response to the operation of the character key levers or the operation of the carriage return key lever. Under such conditions the indicator 241 of the indicating device I8 will remain in its previously advanced position pending the transmission of the flash or urgent message through the operation of the key levers and the rotation of cam drum 45. When transmission of the flash or urgent message has been completed, switch member 361 may be restored to its tape transmission keyboard operation position wherein the tape transmitter I1 will resume its operation and indicating device I8 will be placed under the control of the perforator I6 and will continue its operation from the point reached in the message when the switch member 301 was moved from its tape transmission perforator operation position to its direct keyboard transmission position for the transmission of the flash or urgent message. By retaining the indicating pointer 241 of the indicating device I8 in its advanced position during transmission of the flash or urgent message, the operator will know the exact position of the line of printing, as represented in tape I 22, when perforator operation is resumed.

The switch member 301 has a third position for the control of the apparatus; namely, the keyboard-perforate position. When in this position, the keyboard transmitter I5 and the tape perforator l6 will be operated. The tape transmitter may also be operated due to the fact that contacts 355 and 356 may be closed, which causes energization of electromagnet 2I8 and rotation of distributor cam sleeve 204. This position of the switch member 301 is represented by K]? on semi-circular member 3I5.

With the switch member 361 in the position indicated KP, arm 322 will be rotated to its extreme left-hand position, as viewed in Fig. 1, wherein arm 369 causes lever 358 to be rotated to a position where contacts 355 and 356 are separated. The energizing circuit for electromagnet H8 is thereupon opened. Also, with switch member 301 in its extreme left-hand position, link 325 is moved to the right, as viewed in Fig. l, whereupon through link I11 U-shaped member I58 is rotated about its pivots I59 and I60 to a position where lever 56 lies out of the path of arm I63 ofthe universal bail I03 so that the depression of key levers 20 and the space bar IIII will not operate lever I56 and thus control the operation of clutch I 38 through which power is communicated to cam I36 for operating the perforator I 6. Also, with link 325 in its extreme right-hand position, arm 326 will have engaged lever 328 to rotate arm 330 in the path of 33I which, as previously described, is operated by cam 338 mounted on cam drum 45 which is driven through the toothed members 62 and 63. In addition, the movement of link 325 to its extreme right-hand position permits spring 353 to rotate lever 346 out of the path of arm 349, which is operated by lever I3I of the perforator I6 so that even though lever I3I is operated by its cam I36, lever 346 will not be operated when the link 325 is in its extreme right-hand position, as viewed in Fig. 1. Consequently, bar 28I through which the counting mechanism is operated will not be reciprocated for each cyclic operation of the perforator.

Operatively associated with and operated by lever 330 is a bar 313, Figs. 1, 2, and 4, which has one end supported by a shoulder screw 314, Fig. 4, fastened to a bracket 315 mounted on the upper face of base I2. As shown in Fig. 4, bar 313 is slotted at the location of screw 314 which permits limited reciprocation. The other end of bar 313 is fastened to one end of a bell crank lever 316 rotatably supported by a shoulder screw 311, Fig. 1, supported by a bracket 319, Fig. 2, secured to the upper face of base I2 and provided with an adjustable screw 38!) to limit the leftward travel of bar 313 and thus control the extent of counterclockwise rotation of bell crank lever 316. Bracket 319 also carries a spring post to receive one end of a spring 38I which has its other end secured to an arm of lever 316. Thus, it is seen that bar 313 is moved to the right, as viewed in Fig. 4, against the tension of spring 38I.

As illustrated in Figs. 1 and 4, the free arm of bell crank lever 316 is positioned above pivoted lever I5I so that upon clockwise rotation of bell crank 316, lever I5I will be rotated against the tension of its spring I15 to render clutch I38 effective, whereupon cam I36 rotates to operate punch hammer I23 through arm I3I and its associated apparatus. It is thus apparent that for each operation of cam drum 45 cam 338 is effective to operate arm 330 through arm 33I, whereupon bar 313 is moved to the right, as viewed in Fig. 4, against the tension of its spring 38I. Bell crank lever 316 is rotated clockwise, as viewed in Fig. 1, and lever I5I is rotated to release clutch I38, as previously described in connection with the detailed description .of the perforator and its operation. When cam 338 has rotated to a position where its apex clears the cam follower roller 331, spring 38I will restore bar 313 and arm 330 to their normal or unactuated position.

When switch arm 301 is in the position indicated by the letters KP, the keyboard and the cam drum 45 are operated to transmit to the connected line, provided the line circuit has been closed, and to the receiving printer, signals in accordance with the operation of the key levers 20 and to perforate tape I22 correspondingly. Inasmuch as receiving printer I3 responds to the operation of the key levers 20 and since such a printer prints the characters or the message in page form, the character counter I8 is not required in such operation because the receiving printer I3 serves to indicate to the operator the end of a line of printing, whereupon the operator depresses the carriage return key which transmits a signal to restore the carriage to its beginning of line position and to perforate in tape [22 through the corresponding setting of the interponents I24 a signal combination indicative -of the carriage return function. For each operation of cam drum 45 in response to the depression of each of the key levers 20 and the space .bar llll, cam 338 operates arm 33l to in turn operate arm 33!). Through the operation of arm 330 bar 313 is moved to the right to rotate bell crank 316 in a clockwise direction to depress lever through which clutch I38 is released.

It is apparent from the previous description that with the switch member 301 in its extreme left-hand position, the cam drum 65 will be operated in the same manner as previously described, when the switch member 30'! was in its keyboard position; that is, the position indicated by the letter K. However, with the switch member 301 in its extreme left-hand position, bar 313 will be operated through arms 33! and 339 for each cycle of rotation of cam drum 45 so that the perforator, instead of being controlled from the key levers and the space bar llll, is controlled from and is operated in timed relation with the operation of cam drum 55.

If after the tape I22 has been prepared with theswitch member 331 in its extreme left-hand position it is desiredto transmit the signals represented by the transverse rows of perforations, the perforated tape I22 is inserted in transmitter II and contacts 355 and 356 are closed through the appropriate operation of lever 362. Under such circumstances, electromagnet 218 will be energized and cam drum 204 will be rotated whereupon the transverse rows of perforations will be sensed and signals will be transmitted through the corresponding operation of contact springs 2'28 and'223, as described in detail in connection with the operation of the tape transmitter.

While the invention has been described as applied to a particular form of apparatus, it is apparent that it is applicable to other forms of apparatus without departing from the spirit and scope of the present invention.

What is claimed is:

1. In a telegraph machine, electrical contacts, an element individual to each contact for determining its operation, key controlledmembers for controlling the operation of said individual elements, means for operating said elements and accordingly said contacts successively for :the

transmission of code signals as determined by the operation of said members, a punching mechanism, means controlled by said key controlled elements for controlling said punching mechanism whereby a tape punched in accordance with the code signals is prepared, a tape transmitter controlled by tape prepared by said punching mechanism including tape sensing elements, means controlled by said sensing elements, and a distributor operative for transmitting code signals in accordance with the operation of the means controlled by said sensing elements, and means selectively positionable for determining the operation of said electrical contacts, punching mechanism, and tape transmitter.

2. In a telegraph machine, electrical contacts, means for operating said contacts for the transmission of code signals, a plurality of code bars for determining the permuted operation of said means, key levers for operating said code bars, a

tacts.

code bars, and means foroperating said eleposition of said code bars, means for actuating said operating means of the perforator elements, manually and cyclically operated means for controlling said actuating means, and selectivelypositionable means for determining whether said actuating'means will be controlled by manually operated means or by cyclically operated means.

3. In a telegraph machine, electrical contacts, means for operating said contacts for the transmission of code signals, a plurality of code bars for determining the permuted operation of said means, key levers for operating said code bars, a perforator including elements controlled by said code bars, and means for operating said elements to perforate a tape in accordance with the position of said code bars, a cam for actuating the operating means of the perforator elements, manually and cyclically operated means for controlling the rotation of said cam, and selectively positionable means for determining whether the effectiveness of said cam will be controlled manually or cyclically.

l. In a telegraph machine, electrical contacts, means for operating said contacts for the transmission of code signals, a plurality of code bars for determining the permuted operation of said means, key levers for operating said code bars, a perforator including elements controlled by said code bars, and means for operating said elements to perforate a tape in accordancewi-th the position of said code bars, a cam for actuating the operating means of the perforator elements, means controlled by said key levers for controlling the rotation of said cam, means operated cyclically with the operation of said contact operating means for controlling the rotation of said cam, and means for determining whether said cam will be controlled from said key levers or from said cyclically operated means.

5. In a telegraph machine, electrical contacts. an element individual to each contact for determining its operation, a cam drum for operating said contacts successively in accordance withthe position of said elements, key levers for controlling said elements permutably in accordance with code signals to be transmitted, means operated from said key levers for controlling the cyclic rotation of said cam drum, apunching mechanism, means operated in accordance with the operation of said key levers for operating saidpunching mechanism whereby a tape is punched in accordance with code signals determined by the operation of said key levers, a cam for opof said cam drum and the operation of said punching mechanism, and means controlledby 3' said selectively positionable means for rendering the rotation of said punching mechanism cam controllable either from said key levers or from the cam'drum for operating said electrical con- 6. In a telegraph machine, electrical contacts,

an element individual-to each contact for determining its operation, key controlled members for controlling the operation of saiddndividual elements, means for operating said elements andaccordingly said contacts successively for the transmission of code signals as determined by the operation of said members, a punching mechanism, means controlled by said key controlled elements for controlling said punching 

